text: import { getLuminance } from './index';
  
  export default function getContrastRatio(foreground, background) {
      const lumA = getLuminance(foreground);
      const lumB = getLuminance(background);
      return (Math.max(lumA, lumB) + 0.05) / (Math.min(lumA, lumB) + 0.05).toFixed(3);
  }
  